I think it's a one-time subscription fee to get the full access on-demand (and more $ than more limited access to watch full stages live). It might not be worth it to you now, since it's so far into the race, but I believe that it gives you the option to watch it live or to go back and watch later. You'll see 3 video options on Versus. There's free access and then 2 levels of pay access, I think.